Well 2 days ago I drove the car for about 2-3 hours. everything was ok.
Yesterday when I started the car, rpm was very low (I think below 500). it was like working on 3 cylinders but I could still drive it.
Car turned off, when I start it, it starts but turns off immediately.

I could finally got home but it was jumpy and I could smell CO smell or exhust gas. If I pressed full-throttle it drove ok.

I couldn't strat the car if the gas pedal isn't pressed and still rpm was very low.
Took off the spark plugs and it's black as hell:



Someone told me it could be a bad injector but all the plugs are black and not 1.

Could a bad TPS sensor cause that?

The 1.1 motor have only 1 injector.


/John

It's a 1.6 engine.

I checked the TPS and I think something is wrong there:



A should be the upper terminal and B should be the lower one right?
Because when I checked voltage when the throttle is closed, I got 5V by checking A & C.

I should have gotten 0.5V.

When it's full throttle, I got 0.5V by checking A & C. that means it should be the opposite.

When I checked B & C it was 0.5V closed and 5V full-open.
It seems weird because car drove good for about half a year and I didn't have rpm issues.

I've changed the TPS connector today, old one looked like this:



When I touched the wires, engine respond changed.
Now it's ok since the connector is new.

I also changed the ECT sensor, I thought it's wrong and can cause problems:



I've made some test, parameters that should be:
20c - 3515ohm
40c - 1460ohm
60c - 667ohm
80c - 332ohm

I putted the old sensor in hot and cold water.
When hot, I got around 400ohm.
When I putted it in cold ice water, I got around 1400 reading.
I think it's faulty.

I putted a new ECT sensor in, cleaned the spark plugs and started the engine.
Engine started immediately, but EML light was still on. maybe because I didn't took the battery off when I removed the sensor?

Car runs fine, although it suddenly turned off when I changed from second gear to neutral and was going to stop. it happened 2 times.

I'll take off the spark plugs again, I hope to see if 2 hours drive yesterday cleaned them.

Took 2 of the spark plugs off after the 2 hour ride yesterday: